pKa
The - log10(pH) thing..... Hydrogen ion concentration.... Which just so happens to be a measure of an acid's.......... Strength..... Guh.....
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chem.libretexts.org chem.libretexts.org
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acidity in the haloacids increases as we move down the column
The more stable the conjugate base (i.e. No H+ proton), the stronger the acid.
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we might expect fluoride to also be the least basic halogen ion
Why is this so? Perhaps one thinks that fluorine is best able to attract negative charges, as it is the most electronegative element. But in fact, it is the size that begins to matter.
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